//
//  composeViewController.swift
//  SinaWeibo
//
//  Created by gaoliang on 15/11/19.
//  Copyright © 2015年 gaoliang. All rights reserved.
//

import UIKit
import SnapKit
import SVProgressHUD

class composeViewController: UIViewController {

    @objc func selectPicture() {
        selectorVC.view.snp_updateConstraints { (make) -> Void in
            make.height.equalTo(224 + 80 + 40)
        }
    }
    
    @objc func close() {
        dismissViewControllerAnimated(true, completion: nil)
    }
    @objc private func send() {
    
        let urlString = "https://upload.api.weibo.com/2/statuses/upload.json"
        guard let token = UserAccountViewModel().token else {
            SVProgressHUD.showErrorWithStatus("客官,您还未登陆哦噢噢噢")
            return
        }
            
        if selectorVC.imageList.count >= 1 {
            let imageData = UIImagePNGRepresentation(selectorVC.imageList[0])
            let parmaters = ["access_token": token,"status": textView.text]
            NetworkingTools.sharedTools.uploadImage(urlString, parmaters: parmaters, imageData: imageData!, finished: { (result, error) -> () in
                if error != nil {
                    SVProgressHUD.showErrorWithStatus("客官,您还未登陆哦噢噢噢")
                    return
                }
                
                SVProgressHUD.showSuccessWithStatus("发布Weibo成功")
            })
        }
    }
    
    //MARK: 2.设置 UI
    override func viewDidLoad() {
        super.viewDidLoad()
        view.backgroundColor = UIColor.whiteColor()
        
        setupUI()
    }
    private func setupUI() {
        //设置顶部
        setNavBar()
        //设置文本
        setupTextView()
        //设置底部栏
        setupToolBar()
        
        //添加图片选择控制器视图
        selectView()
        //注册通知
        registerNotifiaction()
        
    }
    
    private func selectView() {
        //添加子视图控制器
        addChildViewController(selectorVC)
        //添加视图
        view.addSubview(selectorVC.view)
        
        //调整视图层次的结构
        view.bringSubviewToFront(toolBar)
        selectorVC.view.snp_makeConstraints { (make) -> Void in
            make.left.bottom.right.equalTo(view)
            make.height.equalTo(0)
        }
        
    }
    //添加通知
    private func registerNotifiaction() {
        NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillChange:", name: UIKeyboardWillChangeFrameNotification, object: nil)
    }
    //移除通知
    deinit{
        NSNotificationCenter.defaultCenter().removeObserver(self)
    }
    
    @objc private func keyboardWillChange(n: NSNotification) {
        
        //获取动画事件
        let duration = n.userInfo![UIKeyboardAnimationDurationUserInfoKey] as! Double
        let rect = (n.userInfo![UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue()
        //修改 toolBar 约束
        //获取键盘高度
        let offset = -screenH + rect.origin.y
        toolBar.snp_updateConstraints { (make) -> Void in
            make.bottom.equalTo(offset)
        }
        UIView.animateWithDuration(duration) { () -> Void in
            
            //强制刷新
            self.view.layoutIfNeeded()
        }

    }
    
   
    //MARK: 懒加载所有控件
    private lazy var textView: UITextView = {
        let tv = UITextView()
        tv.delegate = self
        tv.font = UIFont.systemFontOfSize(18)
        tv.textColor = UIColor.darkGrayColor()
        //设置键盘消失
        tv.keyboardDismissMode = UIScrollViewKeyboardDismissMode.OnDrag
        //设置弹簧效果开启
        tv.alwaysBounceVertical = true
        return tv
    }()
    private lazy var placeHolderLabe: UILabel = UILabel(title: "分享新鲜事...", size: 18, color: UIColor.lightGrayColor())
    private lazy var toolBar: UIToolbar = UIToolbar()
    
    //照片选择器
    private lazy var selectorVC: PictureSelectorViewController = PictureSelectorViewController()
    

}

extension composeViewController: UITextViewDelegate {
    func textViewDidChangeSelection(textView: UITextView) {
        //设置展示文本隐藏
        placeHolderLabe.hidden = textView.hasText()
        //设置发布按钮的交互
        self.navigationItem.rightBarButtonItem?.enabled = textView.hasText()
    }
}

//设置 UI
extension composeViewController{
   
    //设置底部工具栏
    private func setupToolBar() {
        view.addSubview(toolBar)
        //设置约束
        toolBar.snp_makeConstraints { (make) -> Void in
            make.left.bottom.right.equalTo(view)
            make.height.equalTo(40)
        }
        
        //设置 toolBar 的按钮 以及点击事件
        var items = [UIBarButtonItem]()
        
        //添加 UIBarButtonItem
        let itemSettings = [["imageName": "compose_toolbar_picture","actionName": "selectPicture"],
            ["imageName": "compose_mentionbutton_background"],
            ["imageName": "compose_trendbutton_background"],
            ["imageName": "compose_emoticonbutton_background"],
            ["imageName": "compose_add_background"]]
        for dict in itemSettings {
           //写一个扩展类
            let item = UIBarButtonItem(imageName: dict["imageName"]!, target: self, actionName: dict["actionName"])
    
            items.append(item)
           
            //实例化弹簧
            let space = UIBarButtonItem(barButtonSystemItem: .FlexibleSpace, target: nil, action: nil)
            items.append(space)
        }
        //删除最后一个弹簧
        items.removeLast()
        toolBar.items = items
    }
    
    private func setupTextView() {
        view.addSubview(textView)
        textView.backgroundColor = UIColor.randomColor()
        //设置约束
        textView.snp_makeConstraints { (make) -> Void in
            make.top.left.right.equalTo(self.view)
            make.height.equalTo(view.bounds.height / 3)
        }
        //添加占位文本
        textView.addSubview(placeHolderLabe)
        placeHolderLabe.snp_makeConstraints { (make) -> Void in
            make.top.equalTo(textView.snp_top).offset(8)
            make.left.equalTo(textView.snp_left).offset(5)
        }
    }
    
    //设置导航条
    private func setNavBar() {
        self.navigationItem.leftBarButtonItem = UIBarButtonItem(title: "关闭", style: .Plain, target: self, action: "close")
        self.navigationItem.rightBarButtonItem = UIBarButtonItem(title: "发布", style: .Plain, target: self, action: "send")
        self.navigationItem.rightBarButtonItem?.enabled = false
        let titleVIew = UIView(frame: CGRect(x: 0, y: 0, width: 200, height: 40))
        //        titleVIew.backgroundColor = UIColor.lightGrayColor()
        
        navigationItem.titleView = titleVIew
        
        //添加导航栏 发布信息的 UIlable
        let titleLabe = UILabel(title: "发微博", size: 17, color: UIColor.darkGrayColor())
        let nameLabe = UILabel(title: UserAccountViewModel().userName ?? "", size: 14, color: UIColor.lightGrayColor())
        //添加子视图
        titleVIew.addSubview(titleLabe)
        titleVIew.addSubview(nameLabe)
        //设置约束
        titleLabe.snp_makeConstraints { (make) -> Void in
            make.top.equalTo(titleVIew.snp_top)
            make.centerX.equalTo(titleVIew.snp_centerX)
        }
        nameLabe.snp_makeConstraints { (make) -> Void in
            make.bottom.equalTo(titleVIew.snp_bottom)
            make.centerX.equalTo(titleVIew.snp_centerX)
        }
    }
}